Do you want to compress your images before uploading them online? Sometimes you may have a large number of photos to be used on your website, so you need an online image optimizer to help your site load faster. In this guide, we will share the 15 best free image optimization tools for image compression.

Software like Adobe Photoshop can be expensive and out of budget for many website owners. However, there are a variety of online tools that are free to use and deliver amazing results.

Why should you optimize images? Uploading full-size images may add considerable load time to your web page and it annoys your users. Optimizing your images will greatly help to speed up your website.

Online Image Optimizer Tools

Online Image Optimizer to Speed Up Your Site


Image Optimizer

As its name suggests, ImageOptimizer is an online image optimizer service that resizes, compress and optimize image files. It’s free and it has a desktop version. It offers different compression levels – best quality, high quality, normal, small file size, very small file size, minimum filesize. I’ve tested an image on normal quality level. And the result was not so impressive. It shrunk the image from 491KB to 184KB. The output was just fine.

It allows only one image to compress at a time.

Fixthephoto Online Photoshop Editor

Adobe Photoshop is quite expensive software for image compression. So if you don’t need its all designing and photo editing features, this Fixthephoto Online Photoshop Editor will become your online image optimizer and basic photo editor.

It is the best tool to resize, compress and optimize your pictures for free. Now decreasing the physical size in pixels, file size in weight, resolution in DPI is easy and quite fast. If you don’t want to spend more than 15 seconds to load your images to the website, use the Fixthephoto Online Photoshop Editor.


Compressnow is another free image compressor tool. It helps you to reduce the weight of images. The best thing about this tool is, it allows you to choose % of compression to get a result. Moreover, it supports GIF, JPG, JPEG, PNG file. The downside of this tool is, it doesn’t preserve the image transparency.

Now let’s see how it works. The below image was made with 20% compression and the output was quite OK. The image shrunk from 491 KB to 46KB which is really impressive. However, it gives the flexibility to set the compression percentage. You can upload 10 images at 3MB max each at a time. For a single file, the maximum upload size is 9MB.

If you want to compress other formats in addition to PNG or JPEG, then is for you. It works with JPEG, PNG, GIF & SVG. This powerful online tool reduces the size of images and photo whilst maintaining high quality. It has two types of compression. So, Lossy, and Lossless. I’ve tried a PNG file on this tool and the result was fine. It almost saved 78% and image quality was great. I tried both lossy and lossless compression, but I didn’t find any noticeable difference.

Moreover, you can compress one file at a time and max file size is 10MB.


TinyPNG is my personal favorite. I’ve been using this tool for a while. Most of the images of this blog are optimized by TinyPNG. This tool reduces the size of your PNG files by using smart lossy compression techniques. It also offers JPG compression, but I found that it works great for PNG only. The amazing thing about the tool is, it preserves image transparency.

Recently they launched TinyJPG for JPEG compression. The service is fully free. It also offers plugins for Photoshop and WordPress. Now let’s see how much it can compress the image.

This compression almost saved 80% without losing quality. In addition, remember that compression varies from image to image. It doesn’t have any option to control the compression percentage. But it provides high-quality images with optimum compression. You can compress up to 20 images at a time. So, Maximum file size is 5MB each.

In conclusion, we hope this guide has helped you to find the best free image optimization tools for image compression.

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